Groups question
 

So, I have created a group and added myself to it.

When I open /etc/group I can see the group and it shows that I am a member, but when I run $ groups - it doesn't show the new group in the list. What could be the issue?

what distro are you using? is it centos7?

Yes, just groups, but as current user, not su

P.S. Figured I add this - the new group shows when I run groups <myusername> and when I run id <myusername>, just not when I run groups by itself.

Possible answer:
You didn't log out and log back in yet - so your current ~process~ hasn't become a group member yet.
Answer: new login shell - logout and log back in.

"Hello IT. Have you tried turning it off and on again?"

https://www.youtube.com/watch?v=p85xwZ_OLX0

Gotta love the IT Crowd

Yes definitely you have to logout and login again as said.